Effects of gamma '-precipitate coarseningon tensile properties of Ni base superalloy K44 during long-term aging
文献类型：期刊论文
| 作者 | Hou, JS; Guo, JT; Zhou, LZ; Ye, HQ |
| 刊名 | ACTA METALLURGICA SINICA
 |
| 出版日期 | 2006-05-11 |
| 卷号 | 42期号:5页码:481-486 |
| 关键词 | Ni base superalloy K44 long-term aging gamma ' precipitate strengthening theory |
| ISSN号 | 0412-1961 |
| 通讯作者 | Guo, JT() |
| 英文摘要 | The effects of long-term aging (800-900 degrees C, (1-10) x 10(3) h) on the gamma' coarsening characteristics and the mechanical properties of a corrosion resistant Ni base superalloy K44 have been investigated. SEM observation reveals that the coarsening kinetics of gamma' follows LSW theory at different temperatures and the activation energy for gamma' growth is 255 kJ/mol. Morphological instability occurred in relatively small gamma' precipitates during aging process. At room temperature and 900 V, the yield strength decreases with increasing aging temperature and aging time, while a fluctuation of elongation was observed. The dependence of the yield stress on particle size is explained by Labusch-Schwarz hardening theory rather than classical strengthening theory on coherency and mismatch strengthening. Shearing of strong-coupled dislocations is dominant strengthening mechanism. |
| WOS研究方向 | Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000237981200007 |
| 出版者 | SCIENCE CHINA PRESS |
| 源URL | [http://ir.imr.ac.cn/handle/321006/87281]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Guo, JT |
| 作者单位 | Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China |
| 推荐引用方式 GB/T 7714 | Hou, JS,Guo, JT,Zhou, LZ,et al. Effects of gamma '-precipitate coarseningon tensile properties of Ni base superalloy K44 during long-term aging[J]. ACTA METALLURGICA SINICA,2006,42(5):481-486. |
| APA | Hou, JS,Guo, JT,Zhou, LZ,&Ye, HQ.(2006).Effects of gamma '-precipitate coarseningon tensile properties of Ni base superalloy K44 during long-term aging.ACTA METALLURGICA SINICA,42(5),481-486. |
| MLA | Hou, JS,et al."Effects of gamma '-precipitate coarseningon tensile properties of Ni base superalloy K44 during long-term aging".ACTA METALLURGICA SINICA 42.5(2006):481-486. |
入库方式： OAI收割
来源：金属研究所
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